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The small craters inside the picturesque moon crater Plato are a classic observing challenge. The four largest (the one near the center and the three of similar size) range in size from 2 miles in diameter down to 1.3 miles, and typically require a 6- to 8-inch aperture to be seen visually (and even then the age of the moon and the illumination angle of the sun must be considered as well). The next four smallest require a larger aperture, and the next eight or so are at the limit of what can be seen visually in any amateur telescope. By contrast, this image, taken with the same equipment as described in the previous image (of Jupiter), shows nearly 100 craterlets. Not bad for a lowly earth-based telescope!